How to confirm popup login detail from database

Hello Friends,

I have a project where am making the login form a popup box of javascript. My javascript will alert if email or password is missing but i need to check my database to be sure the email and password are correct beforre redirecting the member to member Page.

I am not so good in javascript but better in PHP below are my scripts

$(document).ready(function() {
 $("#login #cancel").click(function() {
 $(this).parent().parent().hide();
 });
 $("#onclick").click(function() {
 $("#logindiv").css("display", "block");
 });
 $("#contact #cancel").click(function() {
 $(this).parent().parent().hide();
 });

 // Login form popup login-button click event.
 $("#loginbtn").click(function() {
 var login_email = $("#login_email").val();
 var login_pword = $("#login_pword").val();
 if (login_email == "" || login_pword == ""){
 alert("Email or Password was Wrong");
 }else{

         $.ajax({
             type:'POST',
             url:'login_pop.php',           
         });
 }
 });
 });
  

below is 'login_pop.php'

<?php
ob_start();
session_start();
include("joined/attach_source.php");


$login_email = stripslashes($_POST[login_email]);
$login_pword =  stripslashes($_POST[login_pword]);
         
$pw = hash('sha512', $pword);                                   //hashing the password  

//check if the email already exist
else{
         
         $check = mysqli_query($syntaxit, "SELECT * FROM members WHERE member='$email' && pword='$pw' ");
         
         if(mysqli_num_rows($check) < 1) {header("location:login.php?issue=This+Email+or+Password+does+not+exist");}
         
         else{
                                 
                                 $result = mysqli_fetch_array($check);{
                                         $confirm = $result[confirmation];
                                         $status = $result[status];
                                         $act_key = $result[activation_code];
                                 }
                                 
                                 if($confirm!='1') {header("location:login.php?issue=You+have+not+confirmed+your+registration");}
                                         
                                 elseif($status!='Active') {header("location:login.php?issue=Your+Account+has+been+deactivated.+Contact+Us+for+detail");}
                                 
                                         
                                 else{
                                                 //UPDATE LAST VISIT TABLE
                                                 $get = mysqli_query($syntaxit, "SELECT cur_date, cur_time FROM logins WHERE member='$email'");
                                                 $row = mysqli_fetch_array($get);{
                                                         $date = $row[cur_date];
                                                         $time = $row[cur_time];
                                                 }
                                                         
                                                 $update = mysqli_query($syntaxit, "UPDATE logins SET cur_date='$cur_date', cur_time='$cur_time', last_date='$date', last_time='$time' WHERE member='$email'");
                                                 
                                                 $_SESSION[memkey] = $act_key;
                                                 header("location:cpanel/home.php");
                                         }
                 }
         }
?>

the problem is that, once the email and password are entered, the popup window will just disappear with checking or redirect them to the member's page.

pls help.